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From "Zheng Hu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19729) UserScanQueryMatcher#mergeFilterResponse should return INCLUDE_AND_SEEK_NEXT_ROW when filterResponse is INCLUDE_AND_SEEK_NEXT_ROW
Date Mon, 08 Jan 2018 10:08:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16316011#comment-16316011
] 

Zheng Hu commented on HBASE-19729:
----------------------------------

BTW,  after discussed with [~zghaobac] offline,  we found another  relative bug: 
{code}
public class TestScanWithFilterAndMaxVersion {

  public final static HBaseTestingUtility UTIL = new HBaseTestingUtility();

  public static TableName TABLE_NAME = TableName.valueOf("test");
  public static byte[] ROW = Bytes.toBytes("r");
  public static byte[] FAMILY = Bytes.toBytes("f");
  public static byte[] QUALIFY = Bytes.toBytes("q");
  public static byte[] VALUE = Bytes.toBytes("v");

  @Test
  public void test() throws Exception {
    UTIL.startMiniCluster();
    Table table = UTIL.createTable(TABLE_NAME, FAMILY, 4);

    for (int i = 0; i < 4; i++) {
      Put put = new Put(ROW);
      put.addColumn(FAMILY, QUALIFY, VALUE);
      table.put(put);
    }

    Scan scan = new Scan();
    scan.addColumn(FAMILY, QUALIFY);
    scan.setFilter(new QualifierFilter(CompareOperator.EQUAL, new BinaryComparator(QUALIFY)));
    scan.readVersions(3);

    try (ResultScanner scanner = table.getScanner(scan)) {
      Result result = scanner.next();
      Assert.assertEquals(3, result.size());
    }
  }
}
{code}

In short,  when a scan with specific columns  & filter to return INCLUDE*  & specific
version to read,  the scanner may return cells more than the specific version.  

Will fix this bug in this patch. 

> UserScanQueryMatcher#mergeFilterResponse should return INCLUDE_AND_SEEK_NEXT_ROW when
filterResponse is INCLUDE_AND_SEEK_NEXT_ROW
> ---------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-19729
>                 URL: https://issues.apache.org/jira/browse/HBASE-19729
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Zheng Hu
>            Assignee: Zheng Hu
>         Attachments: HBASE-19729.v1.patch
>
>
> As we've discussed in HBASE-19696 
> https://issues.apache.org/jira/browse/HBASE-19696?focusedCommentId=16309644&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16309644
> when (filterResponse, matchCode) = (INCLUDE_AND_SEEK_NEXT_ROW, INCLUDE) or 
> (INCLUDE_AND_SEEK_NEXT_ROW, INCLUDE_AND_NEXT_COL) ,  we should return INCLUDE_AND_SEEK_NEXT_ROW
as the merged match code. 
> Will upload patches for all branches. 



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